/** 在字符串末尾追加字符串 **/
String.prototype.append = function(str) {
  return this.concat(str);
};
/** 删除指定索引位置的字符，索引无效将不删除任何字符 **/
String.prototype.deleteCharAt = function(index) {
  if (index < 0 || index >= this.length) {
    return this.valueOf();
  } else if (index == 0) {
    return this.substring(1, this.length);
  } else if (index == this.length - 1) {
    return this.substring(0, this.length - 1);
  } else {
    return this.substring(0, index) + this.substring(index + 1);
  }
};
/** 删除指定索引区间的字符串 **/
String.prototype.deleteString = function(start, end) {
  if (start == end) {
    return this.deleteCharAt(start);
  } else {
    if (start > end) {
      var temp = start;
      start = end;
      end = temp;
    }
    if (start < 0) {
      start = 0;
    }
    if (end > this.length - 1) {
      end = this.length - 1;
    }
    return this.substring(0, start) + this.substring(end + 1, this.length);
  }
};
/** 检查字符串是否以subStr结尾 **/
String.prototype.endWith = function(subStr) {
  if (subStr.length > this.length) {
    return false;
  } else {
    return this.lastIndexOf(subStr) == this.length - subStr.length
      ? true
      : false;
  }
};
/** 比较两个字符串是否相等，也可以直接用 == 进行比较 **/
String.prototype.equal = function(str) {
  if (this.length != str.length) {
    return false;
  } else {
    for (var i = 0; i < this.length; i++) {
      if (this.charAt(i) != str.charAt(i)) {
        return false;
      }
    }
    return true;
  }
};
/** 比较两个字符串是否相等，不区分大小写 **/
String.prototype.equalIgnoreCase = function(str) {
  var temp1 = this.toLowerCase();
  var temp2 = str.toLowerCase();
  return temp1.equal(temp2);
};
/** 将指定的字符串插入到指定的位置后面，索引无效将直接追加到字符串的末尾 **/
String.prototype.insert = function(ofset, subStr) {
  if (ofset < 0 || ofset >= this.length - 1) {
    return this.append(subStr);
  }
  return this.substring(0, ofset + 1) + subStr + this.substring(ofset + 1);
};
/** 判断字符串是否数字串 **/
String.prototype.isAllNumber = function() {
  for (var i = 0; i < this.length; i++) {
    if (this.charAt(i) < "0" || this.charAt(i) > "9") {
      return false;
    }
  }
  return true;
};
/** 将字符串反序排列 **/
String.prototype.reserve = function() {
  var temp = "";
  for (var i = this.length - 1; i >= 0; i--) {
    temp = temp.concat(this.charAt(i));
  }
  return temp;
};
/** 将指定的位置的字符设置为另外指定的字符或字符串.索引无效将直接返回不做任何处理 **/
String.prototype.setCharAt = function(index, subStr) {
  if (index < 0 || index > this.length - 1) {
    return this.valueOf();
  }
  return this.substring(0, index) + subStr + this.substring(index + 1);
};
/** 检查字符串是否以subStr开头 **/
String.prototype.startWith = function(subStr) {
  if (subStr.length > this.length) {
    return false;
  }
  return this.indexOf(subStr) == 0 ? true : false;
};
/** 计算长度，每个汉字占两个长度，英文字符每个占一个长度 **/
String.prototype.charLength = function() {
  var temp = 0;
  for (var i = 0; i < this.length; i++) {
    if (this.charCodeAt(i) > 255) {
      temp += 2;
    } else {
      temp += 1;
    }
  }
  return temp;
};
String.prototype.charLengthReg = function() {
  return this.replace(/[^\x00-\xff]/g, "**").length;
};
/** 去掉首尾空格 **/
String.prototype.trim = function() {
  return this.replace(/(^\s*)|(\s*$)/g, "");
};
/** 测试是否是数字 **/
String.prototype.isNumeric = function() {
  var tmpFloat = parseFloat(this);
  if (isNaN(tmpFloat)) return false;
  var tmpLen = this.length - tmpFloat.toString().length;
  return tmpFloat + "0".Repeat(tmpLen) == this;
};
/** 测试是否是整数 **/

String.prototype.isInt = function() {
  if (this == "NaN") return false;
  return this == parseInt(this).toString();
};
/** 获取N个相同的字符串 **/
String.prototype.Repeat = function(num) {
  var tmpArr = [];
  for (var i = 0; i < num; i++) tmpArr.push(this);
  return tmpArr.join("");
};
/** 合并多个空白为一个空白 **/

String.prototype.resetBlank = function() {
  return this.replace(/s+/g, " ");
};
/** 除去左边空白 **/

String.prototype.LTrim = function() {
  return this.replace(/^s+/g, "");
};
/** 除去右边空白 **/

String.prototype.RTrim = function() {
  return this.replace(/s+$/g, "");
};
/** 除去两边空白 **/

String.prototype.trim = function() {
  return this.replace(/(^s+)|(s+$)/g, "");
};
/** 保留数字 **/

String.prototype.getNum = function() {
  return this.replace(/[^d]/g, "");
};
/** 保留字母 **/

String.prototype.getEn = function() {
  return this.replace(/[^A-Za-z]/g, "");
};
/** 保留中文 **/

String.prototype.getCn = function() {
  return this.replace(/[^u4e00-u9fa5uf900-ufa2d]/g, "");
};
/** 得到字节长度 **/

String.prototype.getRealLength = function() {
  return this.replace(/[^x00-xff]/g, "--").length;
};
/** 从左截取指定长度的字串 **/

String.prototype.left = function(n) {
  return this.slice(0, n);
};
/** 从右截取指定长度的字串 **/

String.prototype.right = function(n) {
  return this.slice(this.length - n);
};
/*** 删除首尾空格 ***/

String.prototype.Trim = function() {
  return this.replace(/(^\s*)|(\s*$)/g, "");
};

/*** 统计指定字符出现的次数 ***/

String.prototype.Occurs = function(ch) {
  //  var re = eval("/[^"+ch+"]/g");
  //  return this.replace(re, "").length;
  return this.split(ch).length - 1;
};

/*** 检查是否由数字组成 ***/

String.prototype.isDigit = function() {
  var s = this.Trim();
  return s.replace(/\d/g, "").length == 0;
};

/*** 检查是否由数字字母和下划线组成 ***/

String.prototype.isAlpha = function() {
  return this.replace(/\w/g, "").length == 0;
};

/*** 检查是否为数 ***/

String.prototype.isNumber = function() {
  var s = this.Trim();
  return s.search(/^[+-]?[0-9.]*$/) >= 0;
};

/*** 返回字节数 ***/

String.prototype.lenb = function() {
  return this.replace(/[^\x00-\xff]/g, "**").length;
};

/*** 检查是否包含汉字 ***/

String.prototype.isInChinese = function() {
  return this.length != this.replace(/[^\x00-\xff]/g, "**").length;
};

/*** 简单的email检查 ***/

String.prototype.isEmail = function() {
  var strr;
  var mail = this;
  var re = /(\w+@\w+\.\w+)(\.{0,1}\w*)(\.{0,1}\w*)/i;
  re.exec(mail);
  if (RegExp.$3 != "" && RegExp.$3 != "." && RegExp.$2 != ".")
    strr = RegExp.$1 + RegExp.$2 + RegExp.$3;
  else if (RegExp.$2 != "" && RegExp.$2 != ".") strr = RegExp.$1 + RegExp.$2;
  else strr = RegExp.$1;
  return strr == mail;
};

/*** 简单的日期检查，成功返回日期对象 ***/

String.prototype.isDate = function() {
  var p;
  var re1 = /(\d{4})[年./-](\d{1,2})[月./-](\d{1,2})[日]?$/;
  var re2 = /(\d{1,2})[月./-](\d{1,2})[日./-](\d{2})[年]?$/;
  var re3 = /(\d{1,2})[月./-](\d{1,2})[日./-](\d{4})[年]?$/;
  if (re1.test(this)) {
    p = re1.exec(this);
    return new Date(p[1], p[2], p[3]);
  }
  if (re2.test(this)) {
    p = re2.exec(this);
    return new Date(p[3], p[1], p[2]);
  }
  if (re3.test(this)) {
    p = re3.exec(this);
    return new Date(p[3], p[1], p[2]);
  }
  return false;
};

/*** 检查是否有列表中的字符字符 ***/

String.prototype.isInList = function(list) {
  var re = eval("/[" + list + "]/");
  return re.test(this);
};

/* 
    * 系统中JS的扩展函数 
    * 
    * 
    */

// 清除两边的空格
String.prototype.trim = function() {
  return this.replace(/(^\s*)|(\s*$)/g, "");
};
// 合并多个空白为一个空白
String.prototype.ResetBlank = function() {
  var regEx = /\s+/g;
  return this.replace(regEx, " ");
};

// 保留数字
String.prototype.GetNum = function() {
  var regEx = /[^\d]/g;
  return this.replace(regEx, "");
};

// 保留中文
String.prototype.GetCN = function() {
  var regEx = /[^\u4e00-\u9fa5\uf900-\ufa2d]/g;
  return this.replace(regEx, "");
};

// String转化为Number
String.prototype.ToInt = function() {
  return isNaN(parseInt(this)) ? this.toString() : parseInt(this);
};

// 得到字节长度
String.prototype.GetLen = function() {
  var regEx = /^[\u4e00-\u9fa5\uf900-\ufa2d]+$/;
  if (regEx.test(this)) {
    return this.length * 2;
  } else {
    var oMatches = this.match(/[\x00-\xff]/g);
    var oLength = this.length * 2 - oMatches.length;
    return oLength;
  }
};

// 获取文件全名
String.prototype.GetFileName = function() {
  var regEx = /^.*\/([^\/\?]*).*$/;
  return this.replace(regEx, "$1");
};

// 获取文件扩展名
String.prototype.GetExtensionName = function() {
  var regEx = /^.*\/[^\/]*(\.[^\.\?]*).*$/;
  return this.replace(regEx, "$1");
};

/******add By 刘景宁 2010-12-09 *******/

String.prototype.replaceAll = function(reallyDo, replaceWith, ignoreCase) {
  if (!RegExp.prototype.isPrototypeOf(reallyDo)) {
    return this.replace(
      new RegExp(reallyDo, ignoreCase ? "gi" : "g"),
      replaceWith
    );
  } else {
    return this.replace(reallyDo, replaceWith);
  }
};
//格式化字符串 add By 刘景宁 2010-12-09
String.Format = function() {
  if (arguments.length == 0) {
    return "";
  }

  if (arguments.length == 1) {
    return arguments[0];
  }

  var reg = /{(\d+)?}/g;
  var args = arguments;
  var result = arguments[0].replace(reg, function($0, $1) {
    return args[parseInt($1) + 1];
  });
  return result;
};

// 数字补零
Number.prototype.LenWithZero = function(oCount) {
  var strText = this.toString();
  while (strText.length < oCount) {
    strText = "0" + strText;
  }
  return strText;
};

// Unicode还原
Number.prototype.ChrW = function() {
  return String.fromCharCode(this);
};

// 数字数组由小到大排序
Array.prototype.Min2Max = function() {
  var oValue;
  for (var i = 0; i < this.length; i++) {
    for (var j = 0; j <= i; j++) {
      if (this[i] < this[j]) {
        oValue = this[i];
        this[i] = this[j];
        this[j] = oValue;
      }
    }
  }
  return this;
};

// 数字数组由大到小排序
Array.prototype.Max2Min = function() {
  var oValue;
  for (var i = 0; i < this.length; i++) {
    for (var j = 0; j <= i; j++) {
      if (this[i] > this[j]) {
        oValue = this[i];
        this[i] = this[j];
        this[j] = oValue;
      }
    }
  }
  return this;
};

// 获得数字数组中最大项
Array.prototype.GetMax = function() {
  var oValue = 0;
  for (var i = 0; i < this.length; i++) {
    if (this[i] > oValue) {
      oValue = this[i];
    }
  }
  return oValue;
};

// 获得数字数组中最小项
Array.prototype.GetMin = function() {
  var oValue = 0;
  for (var i = 0; i < this.length; i++) {
    if (this[i] < oValue) {
      oValue = this[i];
    }
  }
  return oValue;
};

// 获取当前时间的中文形式
Date.prototype.GetCNDate = function() {
  var oDateText = "";
  oDateText += this.getFullYear().LenWithZero(4) + new Number(24180).ChrW();
  oDateText += this.getMonth().LenWithZero(2) + new Number(26376).ChrW();
  oDateText += this.getDate().LenWithZero(2) + new Number(26085).ChrW();
  oDateText += this.getHours().LenWithZero(2) + new Number(26102).ChrW();
  oDateText += this.getMinutes().LenWithZero(2) + new Number(20998).ChrW();
  oDateText += this.getSeconds().LenWithZero(2) + new Number(31186).ChrW();
  oDateText +=
    new Number(32).ChrW() +
    new Number(32).ChrW() +
    new Number(26143).ChrW() +
    new Number(26399).ChrW() +
    new String("26085199682010819977222352011620845")
      .substr(this.getDay() * 5, 5)
      .ToInt()
      .ChrW();
  return oDateText;
};
//扩展Date格式化
Date.prototype.Format = function(format) {
  var o = {
    "M+": this.getMonth() + 1, //月份
    "d+": this.getDate(), //日
    "h+": this.getHours() % 12 == 0 ? 12 : this.getHours() % 12, //小时
    "H+": this.getHours(), //小时
    "m+": this.getMinutes(), //分
    "s+": this.getSeconds(), //秒
    "q+": Math.floor((this.getMonth() + 3) / 3), //季度
    S: this.getMilliseconds() //毫秒
  };
  var week = {
    "0": "\u65e5",
    "1": "\u4e00",
    "2": "\u4e8c",
    "3": "\u4e09",
    "4": "\u56db",
    "5": "\u4e94",
    "6": "\u516d"
  };
  if (/(y+)/.test(format)) {
    format = format.replace(
      RegExp.$1,
      (this.getFullYear() + "").substr(4 - RegExp.$1.length)
    );
  }
  if (/(E+)/.test(format)) {
    format = format.replace(
      RegExp.$1,
      (RegExp.$1.length > 1
        ? RegExp.$1.length > 2 ? "\u661f\u671f" : "\u5468"
        : "") + week[this.getDay() + ""]
    );
  }
  for (var k in o) {
    if (new RegExp("(" + k + ")").test(format)) {
      format = format.replace(
        RegExp.$1,
        RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length)
      );
    }
  }
  return format;
};
Date.prototype.Diff = function(interval, objDate) {
  //若参数不足或 objDate 不是日期类型則回传 undefined
  if (arguments.length < 2 || objDate.constructor != Date) {
    return undefined;
  }
  switch (interval) {
    //计算秒差
    case "s":
      return parseInt((objDate - this) / 1000);
    //计算分差
    case "n":
      return parseInt((objDate - this) / 60000);
    //计算時差
    case "h":
      return parseInt((objDate - this) / 3600000);
    //计算日差
    case "d":
      return parseInt((objDate - this) / 86400000);
    //计算周差
    case "w":
      return parseInt((objDate - this) / (86400000 * 7));
    //计算月差
    case "m":
      return (
        objDate.getMonth() +
        1 +
        (objDate.getFullYear() - this.getFullYear()) * 12 -
        (this.getMonth() + 1)
      );
    //计算年差
    case "y":
      return objDate.getFullYear() - this.getFullYear();
    //输入有误
    default:
      return undefined;
  }
};

//检测是否为空
Object.prototype.IsNullOrEmpty = function() {
  var obj = this;
  var flag = false;
  if (
    obj == null ||
    obj == undefined ||
    typeof obj == "undefined" ||
    obj == ""
  ) {
    flag = true;
  } else if (typeof obj == "string") {
    obj = obj.trim();
    if (obj == "") {
      //为空
      flag = true;
    } else {
      //不为空
      obj = obj.toUpperCase();
      if (obj == "NULL" || obj == "UNDEFINED" || obj == "{}") {
        flag = true;
      }
    }
  } else {
    flag = false;
  }
  return flag;
};
